Doctors' Answers to "Frequently Asked Questions" - Norvasc. These comments are made for the purpose of discussion and should NOT be used as ...A. Norvasc is a long-acting dihydropyridine calcium antagonist, or calcium channel ... B. Norvasc was FDA approved for use in 1996, and is indicated in the ...Find information about which conditions NorvascOral is commonly used to treat. A Minor Drug Interaction exists between enalapril/hydrochlorothiazide and Norvasc. View detailed information regarding this drug interaction. View drug interactions between Norvascand sodium bicarbonate. These medicines may also interact with certain foods or diseases. [ More results from www.drugs.com ]